夹皮沟剪切带与金矿床形成演化关系的模拟实验

夹皮沟金矿床，位于华北地台北缘东段，与剪切带形成，演化密切相关。剪切带发育在长英质片麻岩石中。金矿化主要发育在脆－韧性剪切作用阶段：早期形成了糜棱岩型金矿化；晚期则形成了黄铁矿－石英脉型金矿化（矿床）。不同地球化学图解以及模拟实验表明，两种金矿化（或矿床）是同一剪切带，不同发育阶段的表现形式。金矿化（矿床）是受剪切带中的剪应力、剪切带中循环流体与被剪岩石相互作用而形成的物理－化学场所控制。

Simulation experiments on the relationship between the shear zone and the gold mineralization in Jiapigou area

Located in the eastern part of the northern margin of the North Clina platform,the Jiapigou gold deposits are closely related to the formation and evolution of the shear zone in felsic gneiss. Gold mineralization mainly took place in the brittle-ductile shearing atage,with the rnylonite type gold mineralization formed at the early phase whereas the pyrite-quartz vein type gold mineralization(doposits)at the late phase. Various geocbemical diagrams and simulation experiments show that the two sorts of gold mine-ralization(depopsits)are manifestations of the different developmental stages of the same shear zone,being controlled by the physicocbemical conditions of shearing stress and circular fluids in the shear zone as well as the interactio between the fluids and the sheared rocks.